QUE Ze-li, YANG Ling, WANG Fei-bin, et al. Effects of Screw Extracting Delay Time on Withdrawal Strength of Wood Structural Materials. [J]. China Wood Industry 28(4):32-35(2014)
QUE Ze-li, YANG Ling, WANG Fei-bin, et al. Effects of Screw Extracting Delay Time on Withdrawal Strength of Wood Structural Materials. [J]. China Wood Industry 28(4):32-35(2014) DOI: 10.19455/j.mcgy.2014.04.010.
Effects of Screw Extracting Delay Time on Withdrawal Strength of Wood Structural Materials
Three kinds of structural materials,larch lumber,poplar laminated veneer lumbers(LVL)and poplar plywood were selected to evaluate the effects of screw extracting delay time on withdrawal strength of the materials.The results found that the vertical screw withdrawal strength for larch lumber was higher than the face withdrawal strength of poplar LVL and poplar plywood.With the extension of screw extracting delay time,larch vertical withdrawal strength kept almost the same,while the face withdrawal strength of poplar LVL and plywood increased at the beginning and then decreased until stabilized.The change in the face withdrawal strength of the poplar plywood was smaller than poplar LVL.
关键词
落叶松规格材杨木单板层积材胶合板握螺钉力延迟时间
Keywords
larchdimension lumberPoplarlaminated veneer lumbers(LVL)plywoodwithdrawal strength of screwextracting delay time